Science : Ch 11 – The Human Eye and the Colourful World

The absorption of light by a molecule depends on the

The red colour of the sun at the time of sunrise and sunset is because:

A student traces the path of a ray of light through a triangular glass prism for diferent values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?

Arpit remarked that he has seen wavering of objects when seen through a stream of hot air rising above a tandoor or a fire. He said that the air just above the fire becomes hotter than the air further higher up. He further said that this wavering can also be seen in the earth’s atmosphere as the earth’s atmosphere is not evenly distributed ,What is the total time diference on duration of day on earth?

Why don’t planets twinkle?

The sky appears black to an astronaut

The density of the atmosphere, as we know goes on decreasing as the distance above the sea level increases,this phenomeneon is called

The defect in a person can see nearby objects but not far away objects

The defect the eye cannot focus objects both horizontally and vertically at the same time

When a person can see faraway objects but not nearby objects.

Rainbow is caused due to

A concave lens of short focal length has greater

The colour of scattered light depends on the

The emergent ray in a prism bend at an angle to the direction of the

The refractive index of glass is least for